Lastly, the token encoded a return clause. An escape could be temporary, but the system needed a plan for reintegration. The provenance trail had to remain coherent; departures could not erase origins. The return clause specified windows for reporting back, methods for re-assimilation, and a normalization routine intended to erase the peculiarities the escape introduced. It was a kind of promise: go, but come back cleaned of destabilizing residue.